Annual Progress Report on Malting Barley Research March, 2002

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(Robust), with varying levels of DON were collected in eastern North Dakota as part of
the 1995-2000 regional crop surveys The samples were micro-malted (150, N=2) and
standard quality parameters determined. Plate count (% infected kernels), DON,
xylanase, protease and ergosterol were determined as markers of FHB infection. All
malting and analytical work for this project was completed in 2001. Statistical analysis
of the relationship(s) between the various FHB markers and grain quality is ongoing.
Preliminary results indicate, that while significant correlations exist between several
quality parameters and FHB markers, they will likely be of limited predictive value.
Ongoing work focuses on the characterization of endo-xylanase(s) produced by Fusarium
graminearum.
REGIONAL BARLEY CROP QUALITY
The 2001 survey of the regional barley crop was prepared in cooperation with the
American Malting Barley Association. Periodic summaries of the crop quality were
made available to AMBA members throughout the harvest of 2001. A total of 275 sixrowed
and 21 two-rowed samples were collected in North Dakota and the primary barley
producing regions of Minnesota. Protein and kernel plumpness of the 2001 regional sixrowed
malting barley crop was slightly improved over that seen in 2000. However, color
scores and test weight were comparable to slightly poorer than those observed in 2000
(Table II).
Two hundred and ninety-seven samples collected throughout North and South Dakota
and Minnesota were tested for DON. The average level of DON observed in six-rowed
samples from the 2001 crop (2.6 ppm) was slightly higher than of 2000, but was still
lower than the eight year average (Figure 1). Approximately 39% of the regional sixrowed
crop tested exhibited less than 0.5 ppm DON, which compares to 25% below 0.5
ppm in 2000 (Figure 2).
Table II.
Traditional Six-Rowed Malting Barley Regional Averages for Various Quality
Parameters, 1990-2001.
Year Samples Moisture Color Score % Plump Test Wt (lbs/bu) Protein %
2001 206 12.7 8 75 45.7 13.2
2000 307 12.8 7 69 46.1 13.7
1999 433 13.1 7 69 44.9 12.8
1998 465 12.7 5 68 46.4 12.9
1997 485 13.4 7 74 44.7 12.8
1996 512 13.6 7 83 47.4 12.5
1995 496 13.4 7 76 45.8 12.7
1994 520 13.0 7 76 46.2 12.6
1993 540 12.5 8 68 43.8 12.8
1992 552 13.3 7 82 47.6 12.3
1991 507 12.7 7 68 44.9 13.1